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6. Overfill Protection System (spill catchment basins) required) <br /> A. Nonmotor vehicle fuels (See Option 1A) <br /> 1 . Level sensing device and N2 or N3 below <br /> 2. Audible/visual alarm triggered to liquid level sensor <br /> 3. Automatic shut-off device <br /> B. Motor vehicle fuels only <br /> 1 . Manual monitoring <br /> a. Written filling procedure provided <br /> b. Procedure addresses all of the following: <br /> 1 ) Visual monitoring of fuel level and filling operation <br /> 2) Available caacity of tank is at 103% or +200 gallons <br /> (2635- 9) (AM)(C)) <br /> 3) Metered input <br /> C. Spill catchment basin size <br /> 1 . Minimum 5 gallons <br /> 10. Secondary containers (Includes leak interception and detection systems). <br /> A. Backfill in secondary container -(_ Article 3, Section 2635) <br /> 1 . See Article 3 Section 2635(c) (1-8) . <br /> B. Two or more primary containers within secondary container (Demonstrate <br /> product compatibilities). <br /> C. Liquids detected in secondary containment must be sampled and analyzed for <br /> hazardous substances. (Article 3, Section 2635(6) and Health and Safety <br /> Code 25291 (e)(h) . <br /> D. Water tight cover for secondary container excavation (Article 3, Section <br /> 2635(1)) . <br /> 11 . Piping <br /> A4,q,Double containment required for: <br /> L'!1 . Product and vapor recovery lines. <br /> ✓2. Vent line (excluded only if ball float valve is installed) . <br />